Bump Verify.DiffPlex from 3.1.1 to 3.1.2 in /src#596

dependabot[bot] merged 1 commit intomainVerifyTests/Verify.ImageSharp:mainfrom

dependabot/nuget/src/Verify.DiffPlex-3.1.2VerifyTests/Verify.ImageSharp:dependabot/nuget/src/Verify.DiffPlex-3.1.2Copy head branch name to clipboard